![]() This is different from a standard radio dipole antenna that senses the electric field. The first is the antenna, which is typically a loop antenna used to sense the magnetic field. The VLF receiver front-end consists of three parts. The analog front-end limits the performance of the overall system, making its design critical. These systems consist of an analog front-end, analog to digital converters, and data storage. Off the shelf electronics are not well suited to capture these signals, so the Stanford VLF group has developed it's own specialized receiver systems. This spectrum includes man-made navigation signals, as well as natural phenomenon such as sferics and whistlers, which are generated by lightning. Stanford VLF research is primarily interested in signals with frequencies in the range of 300Hz to 30kHz. Stanford VLF Receiver Front-End VLF Receiver Front-End Introduction
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